Troubleshoot a Rechargeable Phonak Hearing Aid

Last Updated on August 6, 2025 by Jonathan Javid Au.D.

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Phonak rechargeable hearing aids are among the most advanced and user-friendly devices available today for those experiencing hearing loss. Having personally fitted over 1,200 pairs in the last 4 years, I highly recommend these devices due to their reliability, sound quality, and ease of use. In fact, Phonak hearing aids are the most popular hearing aid model fitted by the VA. Despite their quality, like all electronics, they sometimes face technical issues. This article covers common problems, troubleshooting methods, and maintenance tips to help you maximize your device’s lifespan and performance.

Common Issues and Solutions with Phonak Rechargeable Hearing Aids

Rechargeable hearing aids offer great convenience but can encounter charging and performance issues. Below, I detail common problems and practical solutions, supported by detailed instructions and recommendations.

Troubleshooting Charging Problems

Charging issues are one of the most frequent concerns with rechargeable hearing aids. Proper charging is essential for consistent hearing aid function. Here’s a comprehensive checklist to diagnose and fix these problems:

Possible Issue	Troubleshooting Step	Additional Tips
Charging cable loose or faulty	Ensure cable is securely plugged into both charger and outlet	Use original cables or purchase replacement cables
Charging dock not powered	Check power outlet functionality	Try alternate outlets or power sources
Dirty charging contacts on hearing aid	Wipe contacts with alcohol wipes	Do this regularly to prevent buildup
Dirty charging dock contacts	Clean contacts with Q-tip dipped in rubbing alcohol	Ensure dock is dry before use
LED indicator not showing correct status	Refer to LED troubleshooting guide	Check for firmware updates from audiologist

Consistent maintenance of charging equipment greatly reduces device downtime and increases user satisfaction.

Cleaning the Rechargeable Hearing Aid Charger Ports

Regular cleaning of the charging dock is essential to ensure a stable connection between your hearing aids and their power source. Here is a step-by-step guide to clean the charger:

1. Disconnect the dock from the power source and remove hearing aids to prevent accidental damage.
2. Dip a Q-tip in rubbing alcohol and gently clean the metal charging contacts inside the dock holes.
3. Wipe down the outer surface of the charger to remove dust, oils, or smudges.
4. Inspect the charging contacts closely for any debris or corrosion and carefully clean again if necessary.
5. Wait for the dock to dry fully before plugging it back in and replacing the hearing aids.
6. If problems persist, consider replacing the charger. Popular models include Phonak Audeo L charger, Phonak Audeo LR charger, and Phonak Audeo B and M P chargers.

Keeping the charger clean ensures your hearing aids charge fully and reduces unexpected power failures.

Resetting Your Phonak Rechargeable Hearing Aid

If your Phonak hearing aid is unresponsive or shows charging anomalies, a hard reset can often restore normal function. The procedure is straightforward and can be done at home:

• Common signs that a reset is needed:
  1. The LED light on the hearing aid does not flash while in the charger.
  2. The device shows a solid green light but does not turn on when removed from the charger.
• Press and hold the volume control button on the back of the hearing aid for 30 seconds continuously.
• Return the hearing aid to the charger for at least one minute after releasing the button.
• Watch for the LED light to restart — this signals the reboot process.
• Check the LED color:
  • Red or orange means the hearing aid needs more charging time.
  • Yellow or green indicates it has usable battery life.

This reset can also help resolve sound quality and connectivity issues with wireless accessories. If problems persist, consult your audiologist.

Cleaning and Maintenance of Hearing Aids

Replacing Phonak Cerustop Wax Traps (for custom molds)

Wax buildup can drastically reduce sound clarity. Here’s how to replace the wax trap in custom-molded hearing aids:

1. Clean any visible debris with a tissue or lint-free cloth.
2. Unpack a new Cerustop stick.
3. Insert the non-white end (removal side) into the wax trap opening.
4. Gently pull the stick out, bringing the wax trap with it.
5. Rotate the stick to orient the new white wax trap correctly.
6. Insert the fresh wax trap into the opening.
7. Remove the stick, leaving the new wax trap in place.

Replacing Phonak Cerushield Wax Traps (for domes)

For hearing aids with silicone domes, the CeruShield system allows simple wax trap replacement:

• Rotate the CeruShield disk to find a new wax trap.
• Remove the silicone dome by pulling the wire and dome apart.
• Insert the hearing aid into the disk opening marked “1” to remove the old wax trap.
• Move the wire to the hole marked “2” to load a fresh wax trap into the device.
• Reattach the silicone dome or replace it if damaged.

Other Common Issues and Solutions

Identifying and Fixing Sound Distortion

Sound distortion can be frustrating but often has straightforward causes and fixes:

• Make sure the hearing aid is fully and properly inserted in your ear canal.
• Power cycle the device to reset to default settings.
• Check your ear for wax buildup or blockage.
• Consider if the hearing aid has been exposed to moisture or a humid environment — see how drying capsules can help.
• If the hearing aid is whistling or causing feedback, check this guide: Stop hearing aid whistling.
• If your voice sounds muffled or “plugged,” learn about the occlusion effect.
• For persistent issues, consult your audiologist for professional troubleshooting.

Improving Battery Life

Battery life can fluctuate depending on usage and settings. To maximize battery longevity:

• Disable power-intensive features and accessories when not in use.
• Confirm full battery charge through the MyPhonak app.
• Read my detailed guide on why rechargeable hearing aids drain quickly and how to extend battery life.

Resolving Connectivity Issues

Connectivity problems with Bluetooth accessories or phone pairing are common but usually easy to fix:

1. Restart your smartphone.
2. Restart your hearing aids.
3. If problems persist, delete existing Bluetooth pairing between your phone and hearing aids.
4. Re-pair your hearing aids with your phone following this step-by-step guide.

Ensuring Comfortable Wear

Comfort is key to consistent hearing aid use. If you experience irritation or discomfort:

• Check that the device fits well without pressure points.
• Have your hearing care professional adjust the fit or consider alternative molds or domes.

Preventive Maintenance Tips for Longevity

Preventive care can save you time and money. Consider these essential maintenance tips:

• Clean hearing aids daily with a soft, dry cloth.
• Inspect sound outlets regularly and replace wax filters as needed.
• Store hearing aids in a dry, dust-free case when not worn.
• Schedule routine professional cleanings and checkups.
• Plan to replace your hearing aids approximately every 4 years to keep up with technological advances and wear. Learn more about maintaining backup hearing aids and check my latest hearing aid recommendations.
• Consult the official Phonak instruction manual for device-specific guidance.